(2)
Access Panel 454A Trailing Edge Fairing Doors - Nacelle Strut 1 464A Trailing Edge Fairing Doors - Nacelle Strut 2 474A Trailing Edge Fairing Doors - Nacelle Strut 3 484A Trailing Edge Fairing Doors - Nacelle Strut 4
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
FWD
SEE A
RESERVOIR HYDRAULIC A FWD
DRAIN VALVE 1. TRANSMITTER A CONNECTOR 5. ELECTRICAL
A 1. TRANSMITTER 2. O-RING
A-A (4 LOCATIONS) 4. BOLT (4 LOCATIONS) 3. WASHER
Hydraulic Fluid Quantity Transmitter Installation Figure 401
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A
747-400 MAINTENANCE MANUAL
D. Procedure
S 014-002
(1) Open the doors in the trailing edge fairing (AMM 54-62-00/201).
S 864-003
WARNING: YOU MUST RELEASE THE PRESSURE IN THE PNEUMATIC SYSTEM
_______ BEFORE YOU OPEN THE HYDRAULIC SYSTEM. THE PNEUMATIC SYSTEM PRESSURIZES THE HYDRAULIC RESERVOIR. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY.
(2) Release the pressure in the pneumatic system (AMM 36-00-00/201).
S 864-005
WARNING: YOU MUST RELEASE THE PRESSURE IN THE HYDRAULIC SYSTEM BEFORE
_______ YOU OPEN THE HYDRAULIC SYSTEM. HYDRAULIC FLUID THAT HAS PRESSURE CAN CAUSE INJURY.
(3)
Release the pressure in the applicable hydraulic system and the reservoir (AMM 29-11-00/201).
S 864-031
(4)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7 Overhead Circuit Breaker Panel.
1) 7G04 HYDRAULICS FLUID QTY
(b)
P414 main power distribution panel.
1) E25 HYD FLUID QTY IND
S 684-007
(5)
Do these steps to drain the reservoir:
(a)
Put the container below the reservoir (1).
WARNING: DO NOT CLOSE THE DRAIN VALVE UNTIL YOU REPLACE THE
_______ TRANSMITTER. IF YOU CLOSE THE DRAIN VALVE, THE FLUID CAN COLLECT IN THE HYDRAULIC RESERVOIR AND FLOW ON YOU WHEN YOU REMOVE THE TRANSMITTER.
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747-400 MAINTENANCE MANUAL
(b) Open the drain valve to drain the hydraulic fluid into the container.
S 034-008
(6)
Disconnect the electrical connector (5) from the transmitter (1).
S 024-033
(7)
Remove the bolts (4) which attach the transmitter (1) to the hydraulic reservoir.
S 024-009
CAUTION:_______REMOVE THE TRANSMITTER CAREFULLY. IF YOU DO NOT REMOVE THE TRANSMITTER CAREFULLY, YOU CAN CAUSE DAMAGE TO THE TRANSMITTER OR THE RESERVOIR.
(8)
Remove the transmitter (1) from the hydraulic reservoir.
S 034-010
(9)
Remove the O-ring (2) from the groove at the bottom of the transmitter (1).
S 034-034
(10)
Discard the O-ring (2).
TASK 29-33-01-404-011
3. Hydraulic Fluid Quantity Transmitter Installation (Fig. 401)
_________________________________________________
A. Consumable Materials
(1)
D00153 Fluid - Hydraulic, Fire-Resistant, BMS 3-11
B. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 液压 HYDRAULIC 2(121)
